Light - visible light.. ....light helps to creat visual transformasion in space, perspective,..ligtht is not somethink u can tuch, or u can feel - or thow u can still have a feeling of it, light is warm.With lights help we see things better, in the higher light we can have a bigger contrast, see shape better......the study of light, known as optics, is an important reasearch area in modern physics. there is all kind of different lights : sunligtht, bulbs light, flame, all these kinds of lights we have in our ordinary lifes,....i went to White cube gallery in Roberts Irwins exhibition " ligth and space", which realy imprest me!he created two instalations, ground floor Black3 features and series of floor-to-ceiling parallel scrim material panels, which the viewer must navigate, thereby altering the perceptual field of the space.in the second part of his artist created an installation with hundreds of fluorescent lights mounted at right angles in a non-repeating, grid-like formation. with no fixed focal point, the enveloping visual field resonates with geometric patterns, drawn by luminous lines, which redefine the characteristics of the space.lights and space2 brings together, in a large-scale but concise installation, the three principle points of reference throughout Irwins carrer: light, architrcture and space!